/* 见量 · 结构算量 — 视觉：工程图纸感（墨蓝底 + 蓝图网格 + 施工琥珀高亮），数据区密而清楚 */
:root{
  --bg:#f2f4f7; --surface:#ffffff; --surface2:#f8f9fb; --fg:#111a27; --mute:#4f5d6e; --faint:#8592a3;
  --line:#dde3ea; --line2:#eceff3;
  --ink:#0d1726; --ink2:#14223a; --ink-fg:#e9eef6; --ink-mute:#9fb0c6; --ink-line:rgba(160,190,230,.14);
  --acc:#1d5bd8; --acc-d:#1749b3; --acc-soft:#eaf0fd; --acc-ring:rgba(29,91,216,.22);
  --amber:#e8890c; --amber-soft:#fdf2e1;
  --ok:#137a49; --ok-soft:#e5f4ec; --todo:#a35f08; --todo-soft:#fbf0de; --warn:#b42318; --warn-soft:#fdecea;
  --col:#1b2638; --beam:#2f6fd6; --beam2:#8ab4ee; --slab:#e9edf3; --hole:#ffffff; --sel:#e8890c;
  --grid:rgba(29,91,216,.07);
  --shadow-sm:0 1px 2px rgba(16,28,45,.06);
  --shadow:0 1px 2px rgba(16,28,45,.05),0 6px 20px rgba(16,28,45,.06);
  --radius:14px; --radius-sm:10px;
  --mono:"SF Mono","JetBrains Mono","Roboto Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;
  --bg:#0b111b; --surface:#121a27; --surface2:#0f1622; --fg:#e7ecf3; --mute:#a5b1c1; --faint:#77849a;
  --line:#243043; --line2:#1b2535;
  --ink:#070c15; --ink2:#0d1525;
  --acc:#5b93f5; --acc-d:#7aa8f7; --acc-soft:#15233d; --acc-ring:rgba(91,147,245,.3);
  --amber:#f3a03a; --amber-soft:#33240f;
  --ok:#5fcf95; --ok-soft:#10291d; --todo:#e8ac5c; --todo-soft:#2e2312; --warn:#ff8a80; --warn-soft:#331816;
  --col:#d5dbe5; --beam:#5b93f5; --beam2:#9cc0f6; --slab:#1c2636; --hole:#0b111b; --sel:#f3a03a;
  --grid:rgba(91,147,245,.08);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3); --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
}}
:root[data-theme="dark"]{color-scheme:dark;
  --bg:#0b111b; --surface:#121a27; --surface2:#0f1622; --fg:#e7ecf3; --mute:#a5b1c1; --faint:#77849a;
  --line:#243043; --line2:#1b2535; --ink:#070c15; --ink2:#0d1525;
  --acc:#5b93f5; --acc-d:#7aa8f7; --acc-soft:#15233d; --acc-ring:rgba(91,147,245,.3);
  --amber:#f3a03a; --amber-soft:#33240f;
  --ok:#5fcf95; --ok-soft:#10291d; --todo:#e8ac5c; --todo-soft:#2e2312; --warn:#ff8a80; --warn-soft:#331816;
  --col:#d5dbe5; --beam:#5b93f5; --beam2:#9cc0f6; --slab:#1c2636; --hole:#0b111b; --sel:#f3a03a;
  --grid:rgba(91,147,245,.08);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3); --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei",sans-serif;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased}
.wrap{max-width:1280px;margin:0 auto;padding:0 max(28px,env(safe-area-inset-right)) 0 max(28px,env(safe-area-inset-left))}
h1,h2,h3,h4{line-height:1.3;margin:0}
p{margin:0}
a{color:var(--acc);text-decoration:none}
code{font-family:var(--mono)}
svg.ico{width:18px;height:18px;flex:none}
[hidden]{display:none!important}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}

/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--ink) 92%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--ink-line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-fg)}
.mark{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--acc);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.15)}
.mark svg{width:20px;height:20px}
.brand-name{font-weight:700;font-size:1.12rem;letter-spacing:.02em}
.brand-sub{color:var(--ink-mute);font-size:.95rem;padding-left:10px;border-left:1px solid var(--ink-line)}
.topnav{display:flex;align-items:center;gap:6px;margin-left:auto;margin-right:10px}
.topnav a:not(.btn){color:var(--ink-mute);font-size:.98rem;padding:8px 12px;border-radius:8px;transition:color .15s,background .15s}
.bar-actions{display:flex;align-items:center;gap:8px}
.menu-btn{display:none;place-items:center;width:44px;height:44px;padding:0;border-radius:10px;border:1px solid var(--ink-line);background:rgba(255,255,255,.05);color:#fff;cursor:pointer;-webkit-tap-highlight-color:transparent}
.menu-btn svg{width:22px;height:22px}
.menu-btn .i-shut,.menu-open .menu-btn .i-open{display:none}
.menu-open .menu-btn .i-shut{display:block}

/* ---------- buttons ---------- */
.btn{touch-action:manipulation;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;border:1px solid var(--line);background:var(--surface);color:var(--fg);border-radius:var(--radius-sm);padding:9px 16px;font:inherit;font-size:.98rem;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,color .15s,box-shadow .15s,transform .15s;white-space:nowrap;-webkit-tap-highlight-color:transparent}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--acc);border-color:var(--acc);color:#fff;box-shadow:0 1px 0 rgba(255,255,255,.15) inset,0 4px 14px var(--acc-ring)}
.btn-ghost{background:transparent}
.btn-onink{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.2);color:#fff}
.btn.sm{min-height:36px;padding:6px 14px;font-size:.95rem}
.btn.btn-lg{min-height:50px;padding:12px 24px;font-size:1.04rem;border-radius:12px}
.btn:focus-visible,.tab:focus-visible,.drop:focus-within{outline:2px solid var(--amber);outline-offset:2px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;color:var(--ink-fg);background:
  radial-gradient(800px 420px at 85% 10%,rgba(29,91,216,.35),transparent 70%),
  radial-gradient(600px 400px at 0% 100%,rgba(232,137,12,.10),transparent 70%),
  var(--ink)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--ink-line) 1px,transparent 1px),linear-gradient(90deg,var(--ink-line) 1px,transparent 1px),
    linear-gradient(rgba(160,190,230,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(160,190,230,.05) 1px,transparent 1px);
  background-size:96px 96px,96px 96px,24px 24px,24px 24px;
  -webkit-mask-image:linear-gradient(180deg,#000 30%,transparent);mask-image:linear-gradient(180deg,#000 30%,transparent)}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;padding-top:76px;padding-bottom:84px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--ink-mute);font-size:.95rem;font-weight:600;letter-spacing:.06em;padding:6px 14px 6px 12px;border:1px solid var(--ink-line);border-radius:999px;background:rgba(255,255,255,.03);margin-bottom:22px}
.eyebrow-dot{width:8px;height:8px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 4px rgba(232,137,12,.18)}
.hero h1{font-size:clamp(2.2rem,4.4vw,3.5rem);line-height:1.16;letter-spacing:-.01em;font-weight:800;margin-bottom:20px;color:#fff}
.hero h1 em{font-style:normal;color:transparent;background:linear-gradient(92deg,#7fb0ff,#b9d3ff);-webkit-background-clip:text;background-clip:text}
.lede{font-size:1.16rem;line-height:1.75;color:var(--ink-mute);max-width:32em;margin-bottom:32px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:40px}
.trust-row{list-style:none;padding:0;margin:0;display:grid;gap:14px;max-width:34em}
.trust{display:flex;gap:14px;align-items:flex-start;font-size:1rem}
.t-ico{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:rgba(91,147,245,.14);color:#8fb6ff;border:1px solid rgba(91,147,245,.25)}
.t-ico svg{width:17px;height:17px}
.trust b{color:#fff;font-weight:700;margin-right:8px}
.trust span{color:var(--ink-mute);line-height:1.6}
.trust div{padding-top:3px}

/* hero sheet (示意图，数据取自示例图纸) */
.sheet{margin:0;background:linear-gradient(180deg,rgba(20,34,58,.92),rgba(13,23,38,.92));border:1px solid rgba(160,190,230,.2);border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);overflow:hidden}
.sheet-head{display:flex;justify-content:space-between;gap:12px;padding:12px 18px;border-bottom:1px solid var(--ink-line);font-family:var(--mono);font-size:.82rem;color:var(--ink-mute);letter-spacing:.02em}
.sheet-svg{display:block;width:100%;height:auto;padding:10px 12px 0}
.sh-axis line{stroke:rgba(160,190,230,.28);stroke-width:1;stroke-dasharray:10 4 2 4}
.sh-slab{fill:rgba(91,147,245,.07);stroke:rgba(160,190,230,.35);stroke-width:1}
.sh-hole{fill:#0d1726;stroke:rgba(160,190,230,.5);stroke-dasharray:3 2}
.sh-beam rect{fill:#3c7be6}
.sh-beam .sh-beam2{fill:#86b0f0}
.sh-hot{fill:var(--amber);filter:drop-shadow(0 0 6px rgba(232,137,12,.7));animation:hot 2.6s ease-in-out infinite}
@keyframes hot{50%{opacity:.6}}
.sh-col rect{fill:#e9eef6}
.sh-dim line{stroke:rgba(160,190,230,.55);stroke-width:1}
.sh-dim text{fill:var(--ink-mute);font:12px var(--mono);text-anchor:middle}
.sh-tag line{stroke:var(--amber);stroke-width:1.2}
.sh-tag circle{fill:var(--amber)}
.sh-tag text{fill:#ffd9a3;font:600 13px var(--mono)}
.calc{margin:6px 16px 16px;padding:14px 16px;border-radius:12px;background:rgba(232,137,12,.08);border:1px solid rgba(232,137,12,.3)}
.calc-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.calc-k{color:#ffd9a3;font-weight:700}
.calc-v{font:700 1.3rem var(--mono);color:#fff}
.calc-f{font-family:var(--mono);color:var(--ink-fg);margin-top:4px}
.calc-f span{font-family:inherit;color:var(--ink-mute);font-size:.88rem;margin-left:8px}
.calc-r{color:var(--ink-mute);font-size:.9rem;margin-top:6px;padding-top:8px;border-top:1px dashed rgba(232,137,12,.3)}

/* ---------- sections ---------- */
.work{padding:72px 0}
.band{padding:72px 0;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px 32px;flex-wrap:wrap;margin-bottom:24px}
.kicker{font-family:var(--mono);font-size:.88rem;letter-spacing:.12em;color:var(--acc);font-weight:600;margin-bottom:6px}
.sec-title{font-size:1.9rem;letter-spacing:-.005em;font-weight:800}
.sec-aside{color:var(--mute);font-size:1rem}
.sec-lede{color:var(--mute);font-size:1.08rem;max-width:46em;margin:-8px 0 28px}

/* ---------- workspace ---------- */
.workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:20px}
.side{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:20px;align-items:stretch}
.main-col{min-width:0}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:20px 22px}
.side .panel{padding:18px 18px 20px}
.step-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.step-head h3{font-size:1.08rem;flex:1}
.step-note{color:var(--faint);font-size:.88rem}
.step-num{flex:none;display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--acc-soft);color:var(--acc);font:700 .9rem var(--mono)}

.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;padding:22px 14px;border:1.5px dashed color-mix(in srgb,var(--acc) 40%,var(--line));border-radius:12px;background:
  linear-gradient(var(--grid) 1px,transparent 1px) 0 0/16px 16px,linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/16px 16px,var(--surface2);cursor:pointer;transition:border-color .15s,background-color .15s,transform .15s}
.drop.over{border-color:var(--acc);background-color:var(--acc-soft)}
.drop.over{transform:scale(1.01)}
.drop-ico{width:28px;height:28px;color:var(--acc);margin-bottom:4px}
.drop-t{font-weight:700;color:var(--fg)}
.drop-s{color:var(--faint);font-size:.88rem}
.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}
.controls .btn{padding:8px 10px;font-size:.94rem}
.hint{color:var(--mute);font-size:1rem;margin-top:12px;line-height:1.6}
.state{padding:10px 12px;border-radius:10px;background:var(--surface2);border:1px solid var(--line2)}
.state[data-kind="ok"]{background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 25%,transparent);color:var(--ok)}
.state[data-kind="err"]{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 25%,transparent);color:var(--warn)}
.state[data-kind="busy"]{color:var(--acc)}

.params{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 14px}
.params label{display:flex;flex-direction:column;gap:5px;font-size:.92rem;font-weight:600;color:var(--mute);position:relative}
.params .u{position:absolute;right:11px;bottom:11px;font:500 .82rem var(--mono);color:var(--faint);pointer-events:none}
.params input,.params select{font:inherit;font-size:1rem;font-weight:500;color:var(--fg);height:42px;padding:0 11px;border:1px solid var(--line);border-radius:9px;background:var(--surface2);width:100%;min-width:0;transition:border-color .15s,box-shadow .15s}
.params input{font-family:var(--mono);padding-right:38px}
.params input:focus,.params select:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px var(--acc-ring);background:var(--surface)}
.side .hint{font-size:1rem}

/* empty */
.result:not([hidden]) ~ .empty{display:none}
.empty{text-align:center;padding:48px 32px;min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-style:dashed;background:
  linear-gradient(var(--grid) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/24px 24px,var(--surface)}
.empty-art{color:color-mix(in srgb,var(--acc) 60%,var(--faint));margin-bottom:18px}
.empty-art svg{width:150px;height:auto}
.empty h3{font-size:1.3rem;margin-bottom:8px}
.empty>p{color:var(--mute);max-width:30em}
.empty-steps{list-style:none;counter-reset:s;padding:0;margin:28px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:100%;max-width:620px;text-align:left}
.empty-steps li{counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--mute);font-size:1rem;line-height:1.5}
.empty-steps li::before{content:"0" counter(s);display:block;font:700 .82rem var(--mono);color:var(--acc);margin-bottom:4px}
.empty-steps b{display:block;color:var(--fg)}

/* ---------- result ---------- */
.result{display:grid;gap:16px;animation:rise .35s ease-out}
@keyframes rise{from{opacity:0;transform:translateY(6px)}}
.res-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.res-title{display:flex;align-items:center;gap:10px;min-width:0}
.res-title h3{font-size:1.2rem}
.res-file{font-family:var(--mono);font-size:.88rem;color:var(--mute);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px 12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:28em}
.res-file:empty{display:none}

.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm);overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--acc)}
.card.k-bar::before{background:var(--amber)}
.card.k-rec::before{background:var(--faint)}
.card h4{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 0 4px;font-size:.95rem;color:var(--mute);font-weight:600}
.c-note{font-size:.82rem;font-weight:500;color:var(--faint);background:var(--surface2);border:1px solid var(--line2);border-radius:999px;padding:1px 9px}
.kpi{display:flex;align-items:baseline;gap:8px}
.card .big{font:700 2.1rem/1.15 var(--mono);letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--fg)}
.kpi .unit{font:600 1rem var(--mono);color:var(--faint)}
.card ul{list-style:none;padding:0;margin:12px 0 0}
.card li{position:relative;display:flex;justify-content:space-between;gap:10px;padding:6px 0 8px;font-size:1rem;font-variant-numeric:tabular-nums;border-top:1px solid var(--line2)}
.card li:first-child{border-top:0}
.card li span:nth-of-type(2){font-family:var(--mono);color:var(--fg)}
.card li span:first-of-type{color:var(--mute)}
.card li .share{position:absolute;left:0;bottom:2px;height:3px;border-radius:2px;background:color-mix(in srgb,var(--acc) 30%,transparent);width:var(--p,0%)}
.card.k-bar li .share{background:color-mix(in srgb,var(--amber) 38%,transparent)}
.card li.warn-n span:nth-of-type(2){color:var(--warn);font-weight:700}

.plan-panel{padding:18px 20px 20px}
.plan-head{display:flex;justify-content:space-between;align-items:center;gap:8px 20px;flex-wrap:wrap;margin-bottom:12px}
.blk{font-size:1.06rem;font-weight:700;color:var(--fg)}
.blk-note{color:var(--faint);font-weight:400;font-size:.9rem;margin-left:6px}
.legend{color:var(--mute);font-size:.92rem;display:flex;flex-wrap:wrap;gap:4px 14px;align-items:center}
.legend span{display:inline-flex;align-items:center;gap:6px}
.lg{display:inline-block;width:14px;height:10px;border-radius:2px;border:1px solid color-mix(in srgb,var(--faint) 60%,transparent)}
.lg.col{background:var(--col)} .lg.beam{background:var(--beam)} .lg.beam2{background:var(--beam2)} .lg.slab{background:var(--slab)} .lg.hole{background:var(--hole);border-style:dashed}
.plan-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:16px;align-items:stretch}
.plan{display:flex;align-items:center;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:
  linear-gradient(var(--grid) 1px,transparent 1px) 0 0/20px 20px,linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/20px 20px,var(--surface2)}
.plan svg{display:block;width:100%;height:auto;max-height:62vh}
svg .col{fill:var(--col);cursor:pointer;transition:fill .12s}
svg .beam{fill:var(--beam);cursor:pointer;opacity:.92;transition:fill .12s,opacity .12s}
svg .beam2{fill:var(--beam2);cursor:pointer;opacity:.95;transition:fill .12s}
svg .slab{fill:var(--slab);stroke:var(--faint);stroke-width:1;vector-effect:non-scaling-stroke;cursor:pointer;transition:fill .12s}
svg .hole{fill:var(--hole);stroke:var(--faint);stroke-dasharray:4 3;stroke-width:1;vector-effect:non-scaling-stroke}
svg .sel{fill:var(--sel)!important;opacity:1}
.plan svg text{fill:var(--fg);font-family:var(--mono);font-weight:600;pointer-events:none;paint-order:stroke;stroke:var(--surface2);stroke-width:.25em;stroke-linejoin:round}

.detail{display:flex;flex-direction:column;min-height:0;max-height:min(62vh,560px);overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.pick{padding:0 16px 14px;border-left:3px solid var(--sel)}
.pick-head{position:sticky;top:0;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 -16px 0;padding:8px 8px 8px 16px;background:var(--surface);border-bottom:1px solid var(--line2)}
.pick-title{font-size:.9rem;font-weight:700;color:var(--faint);letter-spacing:.04em}
.pick-close{display:grid;place-items:center;width:36px;height:36px;border:0;border-radius:9px;background:transparent;color:var(--mute);cursor:pointer}
.pick-close svg{width:18px;height:18px}
.pick-head + p{padding-top:12px!important}
.pick p{margin:0;padding:10px 0;font-size:1rem;line-height:1.6;border-top:1px solid var(--line2);word-break:break-word}
.pick p:first-child{border-top:0;padding-top:2px}
.pick b{font-family:inherit}
.pick .hint{display:inline-block;margin-top:2px;font-size:.92rem;color:var(--mute);font-family:var(--mono);line-height:1.55}
.pick p.hint{display:block;font-family:inherit;font-size:1rem}
.pick-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:24px 20px;color:var(--mute)}
.pick-empty svg{width:28px;height:28px;color:var(--faint)}
.pick-empty p{font-size:1rem;line-height:1.6}
.pick:not([hidden]) ~ .pick-empty{display:none}

.warn-panel{padding:16px 20px}
.warn-panel .blk{margin-bottom:8px}
.warn{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.warn li{color:var(--fg);font-size:1rem;line-height:1.55;padding:9px 12px 9px 40px;position:relative;background:var(--warn-soft);border:1px solid color-mix(in srgb,var(--warn) 18%,transparent);border-radius:10px}
.warn li::before{content:"!";position:absolute;left:12px;top:11px;width:18px;height:18px;border-radius:50%;background:var(--warn);color:#fff;font-size:.78rem;font-weight:800;display:grid;place-items:center}
.warn li.ok{color:var(--ok);background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 20%,transparent)}
.warn li.ok::before{content:"✓";background:var(--ok)}

.tables-panel{padding:0;overflow:hidden}
.tabs{display:flex;flex-wrap:wrap;gap:4px;padding:10px 12px 0;border-bottom:1px solid var(--line);background:var(--surface2)}
.tab{position:relative;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:8px 14px;border:0;background:none;font:inherit;font-size:.98rem;font-weight:600;color:var(--mute);cursor:pointer;border-radius:9px 9px 0 0;transition:color .15s,background .15s}
.tab.active{color:var(--acc);background:var(--surface)}
.tab.active::after{content:"";position:absolute;left:10px;right:10px;bottom:-1px;height:2px;border-radius:2px;background:var(--acc)}
.cnt{font:600 .8rem var(--mono);color:var(--faint);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:0 8px;line-height:1.6}
.tab.active .cnt{color:var(--acc);border-color:color-mix(in srgb,var(--acc) 35%,transparent);background:var(--acc-soft)}
.cnt:empty{display:none}
.tab-panel{display:none;padding:14px 16px 16px}
.tab-panel.active{display:block}
.tab-note{color:var(--todo);background:var(--todo-soft);border-radius:9px;padding:8px 12px;margin-bottom:10px;font-size:1rem}

.tw{overflow:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:10px;max-height:70vh}
table{border-collapse:separate;border-spacing:0;width:100%;min-width:860px;font-size:1rem}
th,td{border-bottom:1px solid var(--line2);padding:10px 14px;text-align:left;vertical-align:top}
th,td:not(.f){white-space:nowrap}
th{background:var(--surface2);position:sticky;top:0;z-index:1;font-weight:600;color:var(--mute);font-size:.9rem;border-bottom:1px solid var(--line)}
th.r{text-align:right}
tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background .12s}
tbody tr:nth-child(even) td{background:color-mix(in srgb,var(--surface2) 70%,transparent)}
td:first-child{font-weight:600}
td.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}
td.f{color:var(--mute);min-width:340px;white-space:normal;font-size:1rem;line-height:1.55}
td.f .fx{font-family:var(--mono);color:var(--fg);font-size:.92rem;word-break:break-word}
td.f .rl{display:block;margin-top:4px;color:var(--faint);font-size:.9rem}
tr.sel td,tr.sel:nth-child(even) td{background:color-mix(in srgb,var(--sel) 16%,var(--surface))!important}
tr.sel td:first-child{box-shadow:inset 3px 0 0 var(--sel)}

/* ---------- scope ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.two-col>.col{background:var(--surface2);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px}
.two-col>.col h3{font-size:1.14rem;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.badge{display:grid;place-items:center;width:28px;height:28px;border-radius:8px}
.badge svg{width:16px;height:16px}
.badge.ok{background:var(--ok-soft);color:var(--ok)} .badge.todo{background:var(--todo-soft);color:var(--todo)}
.two-col>.col ul{list-style:none;margin:0;padding:0}
.two-col>.col li{padding:11px 0;font-size:1rem;line-height:1.65;border-top:1px solid var(--line2);color:var(--mute)}
.two-col>.col li:first-child{border-top:0;padding-top:0}
.two-col>.col li b{display:inline-block;min-width:4.5em;color:var(--fg);margin-right:6px}
.two-col>.col.todo li{padding-left:18px;position:relative}
.two-col>.col.todo li::before{content:"";position:absolute;left:2px;top:21px;width:6px;height:6px;border-radius:50%;background:var(--todo)}
.two-col>.col.todo li:first-child::before{top:10px}
.note{margin-top:20px;display:flex;gap:10px;background:var(--amber-soft);border:1px solid color-mix(in srgb,var(--amber) 30%,transparent);border-radius:12px;padding:14px 18px;color:var(--fg);font-size:1rem;line-height:1.6}

/* ---------- trust ---------- */
.trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden}
.tcard{padding:26px 24px 28px;border-left:1px solid var(--line)}
.tcard:first-child{border-left:0}
.tnum{display:block;font:700 .9rem var(--mono);color:var(--acc);letter-spacing:.08em;margin-bottom:14px}
.tcard h3{font-size:1.1rem;margin-bottom:8px}
.tcard p{color:var(--mute);font-size:1rem;line-height:1.7}

/* ---------- conventions ---------- */
.conv-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.conv-item{background:var(--surface2);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;font-size:1rem}
.conv-item.wide{grid-column:span 2}
.conv-k{display:flex;align-items:center;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.conv-k b{font-size:1.08rem;margin-right:6px}
.conv-k code{font-size:.82rem;padding:2px 8px;border-radius:6px;background:var(--acc-soft);color:var(--acc);border:1px solid color-mix(in srgb,var(--acc) 22%,transparent)}
.conv-item p{color:var(--mute);line-height:1.7}

/* ---------- footer ---------- */
.foot{background:var(--ink);color:var(--ink-mute);padding:40px 0 calc(44px + env(safe-area-inset-bottom))}
.foot-row{display:flex;flex-wrap:wrap;gap:14px 32px;align-items:center;justify-content:space-between}
.foot .brand-name{font-size:1.04rem}
.foot-note{font-size:1rem;max-width:36em}
.foot-meta{font:500 .88rem var(--mono);color:#6d7f98;margin-top:22px;padding-top:18px;border-top:1px solid var(--ink-line)}

/* 只在真有悬停的设备上给悬停效果（触屏点完不会“粘”着高亮） */
@media (hover:hover){
  a:hover{text-decoration:underline}
  .brand:hover{text-decoration:none}
  .topnav a:not(.btn):hover{color:#fff;background:rgba(255,255,255,.06);text-decoration:none}
  .btn:hover{border-color:color-mix(in srgb,var(--acc) 55%,var(--line));color:var(--acc);text-decoration:none}
  .btn-primary:hover{background:var(--acc-d);border-color:var(--acc-d);color:#fff}
  .btn-onink:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4);color:#fff}
  .drop:hover{border-color:var(--acc);background-color:var(--acc-soft)}
  .params input:hover,.params select:hover{border-color:color-mix(in srgb,var(--acc) 35%,var(--line))}
  svg .slab:hover{fill:color-mix(in srgb,var(--slab) 70%,var(--acc))}
  svg .beam:hover,svg .beam2:hover{opacity:1;fill:color-mix(in srgb,var(--beam) 70%,var(--sel))}
  svg .col:hover{fill:color-mix(in srgb,var(--col) 60%,var(--sel))}
  svg .sel:hover{fill:var(--sel)!important;opacity:1}
  .pick-close:hover{background:var(--surface2);color:var(--fg)}
  .tab:hover{color:var(--fg);background:color-mix(in srgb,var(--line) 40%,transparent)}
  tbody tr:hover td{background:var(--acc-soft)}
  .tab.active:hover{color:var(--acc);background:var(--surface)}
  .params input:focus:hover,.params select:focus:hover{border-color:var(--acc)}
}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .hero-grid{grid-template-columns:1fr;gap:40px;padding-top:56px;padding-bottom:64px}
  .sheet{max-width:620px}
  .params{grid-template-columns:repeat(2,minmax(0,1fr))}
  .trust-grid{grid-template-columns:1fr 1fr}
  .tcard:nth-child(3){border-left:0}
  .tcard:nth-child(n+3){border-top:1px solid var(--line)}
}
@media (max-width:820px){
  .side{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr}
  .detail{max-height:none}
  .pick-empty{padding:16px}
  .cards{grid-template-columns:1fr}
  .conv-grid{grid-template-columns:1fr}
  .conv-item.wide{grid-column:auto}
}
@media (max-width:720px){
  .wrap{padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left))}
  .brand-sub{display:none}
  .hero-grid{padding-top:40px;padding-bottom:48px}
  .lede{font-size:1.06rem}
  .cta-row .btn{flex:1 1 100%}
  .two-col{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr}
  .tcard{border-left:0!important;border-top:1px solid var(--line)}
  .tcard:first-child{border-top:0}
  .work,.band{padding:52px 0}
  .sec-title{font-size:1.5rem}
  .empty{min-height:0;padding:40px 18px}
  .empty-steps{grid-template-columns:1fr}
  .tab{padding:8px 10px}
  .sheet-head span:last-child{display:none}
}

/* ---------- 手机端 ---------- */
.touch-only{display:none}
@media (pointer:coarse){
  .touch-only{display:inline}
  .drag-only{display:none}
  .btn,.btn.sm{min-height:44px}
  .controls .btn{min-height:46px}
  .params input,.params select{height:46px}
  .params .u{bottom:13px}
  .brand{min-height:44px}
  .pick-close{width:44px;height:44px}
}
@media (max-width:820px){
  /* 构件详情改为底部抽屉：平面图留在上方，手指点哪看哪 */
  .pick:not([hidden]){position:fixed;left:0;right:0;bottom:0;z-index:50;max-height:min(60vh,520px);overflow:auto;overscroll-behavior:contain;
    background:var(--surface);border-left:0;border-top:3px solid var(--sel);border-radius:18px 18px 0 0;box-shadow:0 -14px 40px rgba(10,20,35,.28);
    padding:0 18px calc(16px + env(safe-area-inset-bottom));animation:sheet .22s ease-out}
  .pick-head{margin:0 -18px;padding:6px 8px 6px 18px}
  .pick-head::before{content:"";position:absolute;left:50%;top:6px;width:40px;height:4px;margin-left:-20px;border-radius:2px;background:var(--line)}
  .pick:not([hidden]) ~ .pick-empty{display:flex}
  .detail{border-style:dashed}
  .pick-empty{flex-direction:row;text-align:left;justify-content:flex-start;padding:14px 16px}
}
@keyframes sheet{from{transform:translateY(100%)}}
@media (max-width:720px){
  .menu-btn{display:grid}
  .topnav{position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;gap:2px;margin:0;
    padding:8px max(12px,env(safe-area-inset-right)) 14px max(12px,env(safe-area-inset-left));background:var(--ink);border-bottom:1px solid var(--ink-line);box-shadow:0 18px 30px rgba(0,0,0,.35)}
  .menu-open .topnav{display:flex}
  .topnav a:not(.btn){display:flex;align-items:center;min-height:48px;padding:0 12px;font-size:1.05rem;color:var(--ink-fg);border-radius:10px}
  .topnav a:not(.btn):active{background:rgba(255,255,255,.08)}
  .panel,.side .panel{padding:16px}
  .plan-panel{padding:14px}
  .card{padding:16px}
  .card .big{font-size:1.8rem}
  .res-bar .btn{min-height:44px}
  .sec-head{margin-bottom:18px}
  .tab-panel{padding:12px}
  /* 明细表改卡片：一行一张卡，列名放在左边 */
  .tw{border:0;border-radius:0;max-height:none;overflow:visible}
  .tw table{min-width:0;border-spacing:0}
  .tw thead{display:none}
  .tw table,.tw tbody{display:block;width:100%}
  .tw tr{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 14px 12px;margin-bottom:10px}
  .tw tbody tr:nth-child(even) td,.tw tbody tr td{background:transparent!important}
  .tw tr.sel{border-color:var(--sel);box-shadow:inset 3px 0 0 var(--sel);background:color-mix(in srgb,var(--sel) 9%,var(--surface))}
  .tw tr.sel td:first-child{box-shadow:none}
  .tw td{display:block;min-width:0;padding:8px 0 0;border:0;white-space:normal!important;text-align:left;overflow-wrap:anywhere}
  .tw td::before{content:attr(data-label);display:block;margin-bottom:1px;color:var(--faint);font-size:.82rem;font-weight:500;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif}
  .tw td:first-child{grid-column:1/-1;padding:10px 0 8px;border-bottom:1px dashed var(--line2);font-size:1.06rem}
  .tw td:first-child::before{display:none}
  .tw td.num{text-align:left;font-size:1rem}
  .tw td.f{grid-column:1/-1;min-width:0;margin-top:4px;padding-top:10px;border-top:1px dashed var(--line2)}
  .tw td.f + td.f{border-top:0;margin-top:0;padding-top:8px}
  .tw td.f .fx{font-size:.9rem}
}
@media (max-width:380px){
  .controls{grid-template-columns:1fr}
  .hero h1{font-size:2rem}
  .card .big{font-size:1.6rem}
  .legend{gap:4px 10px;font-size:.88rem}
}
@media (max-height:480px) and (orientation:landscape){
  .bar{height:52px}
  html{scroll-padding-top:60px}
  .pick:not([hidden]){max-height:78vh}
  .hero-grid{padding-top:32px;padding-bottom:40px}
}